/Engine/Source/Runtime/Engine/Classes/Animation/AnimData/IAnimationDataController.h
Set an individual flag for the curve with provided identifier. Broadcasts a EAnimDataModelNotifyType::CurveFlagsChanged notify if successful.
Whether or not the flag state was successfully set
bool SetCurveFlag ( const [FAnimationCurveIdentifier](API\Runtime\Engine\Animation\AnimData\FAnimationCurveIdentifier) & CurveId, EAnimAssetCurveFlags Flag, bool bState, bool bShouldTransact )